Pilling happens when excess fibres are pushed to the surface as external forces are applied from regular usage, or wear and tear.

Several Comfort Works fabrics are of combination compositions. So while a mixed composition provides the best of both worlds, light pilling is actually quite common on these cross-woven textiles. All fabric composition can be view on the fabric sample page here.

The best way to remove them is to use a shaver (yes, a razor shaver) and then some light vacuuming. Here is an informational blog post*

Once excess fibers have lifted up, the pilling will stop.

*Credit to Clean & Scentsible.